We call those " full width" snowblowers here in Minnesota...you can figure out the rest for yourself
MTA, I feel your pain, but on a smaller scale. I've got an electric "power shovel", which is basically the same as what you are talking about, but only about a foot wide, and it can't handle much more than about 3" of snow with some wetness to it. Plow truck comes by and out comes the shovel(s)
Something of that magnitude is gonna run you close to a Grand or better.
Erp! Just noticed the Duallies...add another $500 at least...that suckers gotta be at least 12hp. Probably comes with hand warmers!